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Biomedical Instrumentation Practice Test: Bioelectric Signal & Electrodes
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Bioelectrical signals are generated by nerves and muscle cells. Commonly used bioelectrical signals include electroencephalography (EEG), electrocardiography (ECG), electromyography (EMG), electrodermal activity (EDA) and heart rate variability (HRV). Electrodes transfer from the ionic conduction in the tissue to the electronic conduction which is necessary for making measurements. Biosensors are devices that detect certain biochemical signals and convert them to electrical signals that can be measured.   Topics include: Bioelectric Signals Origin, Recording Electrodes, Silver-Silver... Show more
Biomedical Instrumentation Practice Test: Bioelectric Signal & Electrodes
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25 Questions

1. From equipment point of view, the respiratory system in the human body is a _________ system.
2. The ground electrode is usually positioned over which body structures?
3. Off-set potential is _____________
4. All electrode potentials are measured with respect to which reference electrode?
5. Which electrodes can work even after being induced to large electric discharge such as defibrillation?
6. When intramuscular EMG is required to look into the electrical activities of deeper or overlaid muscles, ________ electrodes are used.
7. The peak to peak amplitude of the waves that can be picked from the scalp is ______________
8. Before placing the electrodes the skin should be __________
9. Surface electrodes damage the living tissues.
10. Electrodes to measure EEG are placed on ________
11. Number of cloud deployment models that are recognized are _________
12. In floating electrodes metal electrode does not make direct contact with the skin.
13. What is the relatively static membrane potential of quiescent cells called?
14. Palsied muscles mean _____________
15. Recording electrical activities associated with heart is known as ____________
16. After a cell is stimulated, a finite period of time is required for the cell to return to its pre-stimulus state. This period is known as ____________
17. Cells depolarize and action potential in generated as soon as a stimulus is applied.
18. Electrode paste ____________
19. Generally what is the material of needle electrodes?
20. Letter F in the EEG electrode placement system denotes?
21. According to the international 10/20 system to measure EEG, even number denotes which side of the brain?
22. Monopolar needle electrodes are having coatings of which material over the stainless steel wires which are bare only at the tips?
23. Glass microcapillaries are preferred over metallic electrodes because of the former _______
24. Which of the following is considered to be the primary pacemaker of the heart?
25. Source of Bioelectric potential is ____________ in nature.

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